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Finding the Fourth Proportional to 108,655.17, 162,949.62 and 75,136.68

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Solution

The fourth proportional to 108,655.17, 162,949.62 and 75,136.68 is: 112,682.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,655.17 : 162,949.62 = 75,136.68 : x
  2. Step 2: Convert to fraction form
    108,655.17/162,949.62 = 75,136.68/x
  3. Step 3: Cross multiply
    108,655.17x = 162,949.62 × 75,136.68
  4. Step 4: Simplify right side
    108,655.17x = 12,243,493,454.06
  5. Step 5: Solve for x
    x = 12,243,493,454.06/108,655.17
  6. Step 6: Final answer
    x = 112,682.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.